Differential Diagnosis of Dysphonia Looks Normal Larynx

Abstract

Voice is a physical phenomenon, generated by vocal fold and expiratory airflow. Dysphonia should come from abnormal vocal fold and airflow. Occassionally larynx looks normal in show, but it is actually not. There should be undetected structural or functional abnormalities. So when ENT doctors face dysphonia patients who looks normal larynx, should make a diagnosis through close observation. In this review article we present some dysphonia diseases which looks normal larynx. For example vocal fatigue, vocal fold paresis, posterior glottic diastasis, muscle tension dysphonia and psychogenic dysphonia. Key words: Vocal fatigue ㆍ Vocal fold paresis ㆍ Posterior glottic diastasis ㆍ Muscle tension dysphonia ㆍ Psychogenic dysphonia 핵심용어: 성대피로 ㆍ ì„±ëŒ€ë¶€ì „ ㆍ 후방성문해리 ㆍ 근긴장성 ë°œì„±ìž¥ì• ã† 심인성 발성장ì•